Remote control parking windshield wiper motor



1952 R. E. UTTER REMOTE CONTROL PARKING WINDSHIELD WIPER MOTOR 2 SHEETSSHEET 1 Filed Nov. 13, 1944 INVENTOR. Rayzzzondb. 01mm BY 1952 R. E. UTTER REMOTE CONTROL PARKING WINDSHIELD WIPER MOTOR Filed Nov. 13, 1944 2 SHEETS-SHEET 2 Patented Jan. 22, 1952 REMOTE CONTROL PARKING WINDSHIELD WIPER MOTOR Raymond E. Utter, Toledo, Ohio, assignor to The Electric Auto-Lite Company, Toledo, Ohio, a

corporation of Ohio Application November 13, 1944, Serial No. 563,263

3 Claims. (01. 121-97) This invention relates to windshield wiper motors, more particularly to motors operated by fluid pressure which are automatically parked when in inoperative condition under control of a segregated manual control at a point remote of the motor.

In the prior art, manifold vacuum operated motors were manually controlled from a remote point by the use of a manually controlled linkage which actuated a control valve mounted on the case of the motor, so that the valve position determined the operative and parking conditions of the motor and also throttling to control the speed of operation of the motor. This control system was not entirely reliable inasmuch as the linkage was made separable to facilitate mounting and often the linkage separated while in use so that an operator lost control over the motor. Furthermore, the linkage is generally subject to considerable lost motion which resulted in erratic control, particularly when throttling was attempted.

Other. remote manual control means in the prior art comprised a remote manually operated control valve having an operating conduit and a parking conduit leading to the motor which were selectively connected by the manual control valve to a source of vacuum to operate, throttle, and park the motor. This construction makes necessary the use of a fluid-pressure operated valve means at the motor to obtain effective parking of the motor, which gave rise to a complicated and sensitive device which was subject to breakdown even with the most careful attention to manufacturing design. This was particularly true with reference to the fluid-pressure operated valve means on the motor. I

The present invention contemplates the provision of a simple and effective remote manual control means which is insensitive and not subject to breakdown by the use of complicated mechanical linkages or sensitive fluid-pressure operated valve means. It further contemplates the provision of a control means in which both throttling and parking of the motor are reliably and simply obtained.

It is, therefore, a principal object of thisinvention to provide a remote manual control means for a fluid-pressure operated windshield wiper motor which is simple and reliable and suitable for mass production.

It is a further object of this invention to provide a remote manual control valve for a fluidpressure operated motor which is in communication with the motor by a multiplicity of conduits all combined into one envelope.

It is a further object of this invention to provide a remote manual control means for a fluidpre'ssure operated windshield wiper motor which is in communication with the motor by a multiplicity of conduits all combined into one envelope which will allow an operator .to controlthe operation and parking of the motor and also to throttle to control the speed of operation.

Other objects and advantages of this invention relating to the arrangement, operation and. function of the related elements of the structure, to various details of construction, to combinations of parts and toeconomies of manufacture, will be apparent to those skilled in the artupon consideration of the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views. l N

Fig. 1 is an elevational view, partly in section, showing the application of the invention to an automobila l Fig. 2 is an elevational view, partly in section, showing the motor and its control in operative relation. I

Fig. 3 is an elevational view, partly in section, showing the motor and its control in parked relation.

Fig. 4 is a plan View, in section, of the connecting conduit.

Fig. 5 is an elevational view of a detail.

Fig. 6 is an elevational view, partly in section, showing a modification of the motor and its control in operative relation.

Fig. 7 is a view of the motor with its flop valve in the second operative position; and

Fig. 8 is a view similar to Fig. 6 showing the motor in parked relation.

Referring now to the drawings, particularly to Fig. 1, an automobile body section 20 isshown having a windshield 22 with a lower edgel l, adjacent which a pivot 26 is mounted in the cowl member 28, having mounted thereon on its outer end a windshield wiper arm 30 for driving a blade 32 over the outer surface of the windshield in an are as is well known in the art. The inner end of the pivot 26is provided with an arm 24. The motor is concealed under a dash 42 and is provided with a manual control 44 connected to the motor by a multi-passage conduit 45 as will be described in greater detail hereinafter. A conduit 46 is provided to communicate with the manual, control 44 and the intakemanifold of the automobile motor (not shown) to .utilizethe suction therein for driving the windshield wiper motor.

The motor 38 may have a casing 48 of semicircular contour as shown injFigsgzand .3 having therein a movable vane or piston 50 oscilla'table about a shaft 52 journaled .in a bearing in the casing. These details of construction .of the casing and piston are well known in the art and may be varied widely. The driver arm 36 is attached to one end of shaft 52 (F-lg. 1) which projects asubstantial distance from the casing. .On the other end 52a of the shaft a non-circular portion 54 is provided which drives an automatic valve oontrol'mechanism (not shown) which may ,beisimilar to any oi/the control mechanisms well known in the art, usually involving an overcenter device which snaps .over from one position to another through .a 'lost motion connection with shaft 52 after the shaft/has been oscillated by the piston 50 tlnoug'h a predetermined angle. This automatic control mechanism moves a flop valve 56 through an angle around the'shaft 52 on 4 which the valve 'is pivoted sufficiently to reverse the. application of a fluid-pressure differential to .the twosidesof the piston in the chambers formed thereby in .the casing. Conduits 58, 60, and-62lead from the respective chamber to a valve seat 64 which is pierced by ports 66 and 6,8 terminating the conduits '60 and '62 respectively. A third port 10 pierces at 'a central loca- .tion the valveseat 64 "between ports 66 and 68 and is placed in communication with a source of suction such as the intake manifold of an automotive engine (notshown) byymeans of conduits "I2 and 46.

The ports 66, and 10 arepreferably univl orm'ly spaced andconcentrically arranged with reference to the shaft '52 so that a depression-7 4 formed in the valve member 56 .will bridge ports [0 and 68, orports "I0 and 66, to control the vacuum appliedto the chambers, when thevalve member 56 ismoved by the, automatic valve control mechanism.

The .three conduits 58, and 12 preferably lead to a connection block l6 (Fig. '5) provided with suitable indexing means and preferably positioned at any convenient .point on the body of motor casing 48, being in communication with nipples 58a, 60a and 12a, which fit into one end passage-ways 586,.606 and 1.26, of a flexible hose 45 (Fig. 4) all of said passage-ways being formed in the unitary body or envelope of the hose, preferably formed of rubber, or the like, having an indexing means 18. The other end of the passage-ways cooperate with a second connection block provided with suitable indexing means whichjis positioned on the manual control valve :44 mounted "to a place remote of the motor as, for example, the dash of the automobile as shown in Fig. 1. Passage-way 56.6 is in communication with port 82 of the manual control valve, passage-way 606 is in communication with port M two recesses .88 and and a venting port 32. Gonduit 46, in communication with the source i so 4 of suction or fluid pressure, is also in communication with port 94.

In Fig. 2 the manual control valve 44 is shown in Run position with the source of suction in communication with conduit 46, which is placed in communication with conduit I2 by recess 90 bridging ports 86 and 264 so that suction will be communicated to the left side ofthe piston from port 10 to port 66 by the valve recess 14, then through conduit 60 to port 82, placed in communication with port 84 by recess 88, thence by conduit 58 to the chamber on the said left side of the piston in the casing 48. Port 68 is at this time open "to the atmosphere so that the right chamber "isvented by conduit 62 so that piston 50 moves clockwise. When the Valve 56 is in the tether position-where its recess I4 bridges ports 10,,and 68, the vacuum is applied to the chamber on the right side of the piston by conduit 62, while port 66 is open to the atmosphere to vent the chamber on the left si'de oi the'piston by conduits 60 and'58 so that-the piston moves counterclockwise. "In this manner the shaft .52

is given an oscillatory movement which operates the wiper blade 32 :on the windshield fl.

When an operator wishes to terminate the normal operation of the :motor and wiper, he moves the manual control valve 44 to the position shown in-Fig. 3, which establishes communication between conduits' 46 and 58 directly 'by bridging ports 64 and 32 by valve recess96, which places suction on the chamber on the left side of the piston. Also venting port 9'2 is moved in alignment with port 86which will vent the "chamher on the right side of the piston to the atmosphere through conduits l2 and 52"wh-ich are' in communication by "flop valve recess '14 bridging ports 70 and '68. This will park the piston as shown with a 'valve disk 86 .on the piston fafl 'c'losing the terminus '98of the conduit 58. When normal operation is again desired, theoperator will move the manual control valve back to its position in 'Fig. 2. For parkingpurposes, vacuum "is maintained at all "times :on the left side of the piston.

In Figs. "6, 7 and 8 a "modification is shown wherein a novel flop valve is disclosed cooperating with a valve seat I02 pierced by five ports I-04, -I-06, I 08, lI-Il and N2. 'The motor casing and piston construction is similar to that already disclosed, and a similar flop valve control mechanism is also provided which will move the flop valve I00 to its two positions substantially as shown in Figs. 6 and 7. Conduit l I4 is provided to communicate with the chamber -on "the right side of the piston terminating in port -I'04 in the valve seat I02, while a second conduit I I6 is provided to communicate with the chamber on the left side of the piston which terminates in port H0. The valve seat -I 02 is also provided with two suction supply ports I06 and 4-08 which communicate by conduits -II8 and I20 with ports I22 and I24 in a fixedipor'tionof a manual control valve 44a located at a point remote from the motor. A recess I26, having a throttling baille I28, places ports I22 and 1-24 in communication with port in communication with conduit 46a leading to a source of suction (not shown).

The valve seat I02 is also provided with a venting port I I2 which is in communication with conduit I32 terminating in port I34 in the fixed portion manual control valve 44a, in whose movable portion vent port I36 provided to align with port I34 when the manual control valve is in Run position as shown in Fig. '6.

The flop valve I00 .isprovidedwith two recesses I38 and I40 in spaced relation separated by 'aweb I42, andprovided with a. flange I 44 on its right side (Fig. 6). In normal operation with the manual control valve,44a. in "Run position, the flop valve recess I38 in one position bridges ports I04 and I06 to place them in communication(Fig. 6) while in-its second position (Fig. '7') it bridges ports I08 and H0, while recess I 40 in the first position (Fig. 6) bridges ports IIO and 'I I2 and in its second position is inoperative (Fig. '7). Web I42 in thefirst'position (Fig. 6) closes port I08 and in the second position (Fig. '7) closes port II2. Flange I44 in the first position (Fig. 6) is inoperative and in its second position (Fig. 7) it closes port I06 while exposing port I04.

Referring to Fig. 6 in the first position of the flop valve I00 with the manual control valve 44:; in Run position, the vacuum is applied to recess ,I26 by port I30 in communication with conduit 46a, then to ports I22 and I24 bridged by the recess I26 to ports I06 and I08 by conduits H8 and I20. Port I08 is closed byweb I42 and is ineffective. Port I06 is placed in communication with port I 04 on valve seat I 02 by recess I38 in flop valve I00, which places the chamber on the right side of the piston in communication therewith by conduit II4 so that suction is effective on this chamber. The chamber on the left side of the piston is vented'to the atmosphere through conduit H6 and recess I 40 of flop valve I00 which bridges ports IIOand II2, the latter port being in communication with conduit I32, whose terminal port I34 is aligned with vent port I36 of the manual control valve. This will effect a counterclockwise movement of the piston until the flop valve I00 is moved to its second position shown in Fig. '7 by the automatic valve actuating mechanism.

The manual control valve 4411 will still be in "Run position so that the suction at port I08 in valve seat I02 will be communicated to port I I0 by the recess I38 in flop valve I00, from here the suction will be communicated to the chamber on the left side of the piston by conduit II6. Port I04 will be opened to the atmosphere by the movement of the flop valve and will vent the chamber on the right side of the piston to the atmosphere through conduit II4. Port. I06 will be closed by flange I44 and will be ineffective, as will also be port II2 which is closed by web I42. This will effect a clockwise movement of the piston until the automatic flop valve actuating mechanism moves the flop valve I 00 again to the first position as shown in Fig. 6 to start a new cycle of oscillation which drives the wiper blade 32 (Fig. 1).

When the operator desires to park the wiper blade 32 adjacent the lower edge 24 of the windshield 22, he moves the manual control valve to a position shown in Fig. 8. The recess I26 bridges ports I30 (vacuum source) I24 and-I34, while venting port I36 will be moved out of alignment with port I34, and a second venting port I46 will be moved into alignment with port I22 as shown. The vacuum will then be applied to ports I24 and I34, and proceeds through conduits I20 and I32 to ports I08 and H2 on the valve seat I02. With the flop valve I00 in its final position during parking as shown in Fig. 8, port I08 is made ineffective by stopping by web I42 while port II2 will be in communication with port IIO by recess I40 in the flop valve so thatsuction will be applied to the chamber on the left side of the piston by conduit II8.' The chamber on the right side of the piston will be vented to the atmosphere through conduit 4 to port I04, which is in communication with port I06 by recess I38 in the flop valve I00, then through conduit II8'to terminal port I22 which is in alignment with venting port I46.

Should the operator change the position of the manual control valve 440. when the flop valve is in the second position shown in Fig. '7, the vac-- uum to bring about the parking operation will proceedfrom port. I08 through recess I38 to port H0 and thence to the chamber on the left side of the piston through conduit H6. The chamber on the right side of the piston will be vented to the atmosphere through conduit II4 whose terminal port I04 is exposed by flange I44. This will institute the parking movement until the flop valve moves to the position shown in Fig. 8 by the automatic flop valve actuating mechanism. I

It is to be understood that the above detailed description of the present invention is intended to disclose an embodiment thereof to those skilled in the art, but that the invention is not to be construed as limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of being practiced and carried out in various ways without departing from the spirit of the invention. The language used in the specification relating to the operation and function of the elements of the invention is employed for purposes of description and not of limitation.

What is claimed:

1. In a device of the class described, a motor having a casing including a portion movable therein when subject to a fluid-pressure differential, automatic valve means controllable by the movable portion to reverse the pressure differential at predetermined times with reference to the movable portion, a valve seat on the easing having five ports, including two suction supply ports, two chamber ports and a vent port, said valve means having a pair of cooperating passages to control the flow of the fluid-pressure difierential to said motor through said ports, and a manually movable control valve cooperating with said ports to determine the operative and parking periods of the motor.

2. In a device of the class described, a motor having a casing including a portion movable therein when subject to a fluid-pressure differential, automatic valve means controllable by the movable portion to reverse the pressure differential at predetermined times with reference to the movable portion, a valve seat on the easing having five ports, including two suction supply ports, two chamber ports and a vent port, said valve means having a pair of spaced passageways to control the flow of the fluid-pressure differentials through said ports, also having a spacing web between said passage-ways and an outwardly extending flange, and a manually movable control valve cooperating with said ports to determine the operative and parking periods of the motor.

3. In a fluid motor, first and second members movable relative to each other back and forth between normal limits under the influence of a reversibly applied difierential between higher and lower fluid pressures, a supply passage adapted for connection to a source of one of said pressures, and valve mechanism for controlling said motor, isaid waive mechanism including -reversp i in'g valve means having means defining passage 7 REFERENCES CITED means ior-ponnect-ing saidsupply passage to :said The following references are record ind-he motor .andlbeing automatically operable at said fil of this patent; limits io reverse said iconneetion, and control 5 valve means operable, at any-time regardless of I D STATES PATENTS the position of said reversing valve means to Number Name Date establish a connection, through said reversing 1,674;056 Gish'eietal June 19,1928 valve passage means, .of said supply passage to 1;840;233 v :Hueber Jan :5, 1932 said motor which causes a said relative move- 10 1,891,670 Ernst 'Dec. 20, 1932 men's :towardone of said limits. 1,9537701 Clark'et a1 -Apr. 3,.1934 RAYMOND E UTTER. 2,257,066 OZShei .Sept. 2-3, 1941 

